Importing emails from M365 Outlook to SDP Cloud has stopped.

Importing emails from M365 Outlook to SDP Cloud has stopped.

Since around 3:00 PM JST on October 20, automatic import of requests from the M365 mailbox to SDP Cloud has stopped working. We reconfigured the mail server, and while we can send emails, we are unable to receive them. Is the email import function on the SDP Cloud side down or frozen?
Our SDP Cloud is the one running in a U.S. data center.